ID

VAR-202102-1488

CVE

CVE-2021-23841

TITLE

Red Hat Security Advisory 2021-5137-03

DESCRIPTION

The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack. The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x). Please keep an eye on CNNVD or manufacturer announcements. Nessus Agent versions 7.2.0 up to and including 8.2.2 were found to inadvertently capture the IAM role security token on the local host during initial linking of the Nessus Agent when installed on an Amazon EC2 instance. This could allow a privileged malicious user to obtain the token. Additionally, one third-party component (OpenSSL) was found to contain vulnerabilities, and updated versions have been made available by the provider. Bugs fixed (https://bugzilla.redhat.com/): 2030932 - CVE-2021-44228 log4j-core: Remote code execution in Log4j 2.x when logs contain an attacker-controlled string value 5. This issue was reported to OpenSSL on 15th December 2020 by Tavis Ormandy from Google. The fix was developed by Matt Caswell. Incorrect SSLv2 rollback protection (CVE-2021-23839) ==================================================== Severity: Low OpenSSL 1.0.2 supports SSLv2. If a client attempts to negotiate SSLv2 with a server that is configured to support both SSLv2 and more recent SSL and TLS versions then a check is made for a version rollback attack when unpadding an RSA signature. Clients that support SSL or TLS versions greater than SSLv2 are supposed to use a special form of padding. A server that supports greater than SSLv2 is supposed to reject connection attempts from a client where this special form of padding is present, because this indicates that a version rollback has occurred (i.e. both client and server support greater than SSLv2, and yet this is the version that is being requested). The implementation of this padding check inverted the logic so that the connection attempt is accepted if the padding is present, and rejected if it is absent. This means that such as server will accept a connection if a version rollback attack has occurred. Further the server will erroneously reject a connection if a normal SSLv2 connection attempt is made. In order to be vulnerable a 1.0.2 server must: 1) have configured SSLv2 support at compile time (this is off by default), 2) have configured SSLv2 support at runtime (this is off by default), 3) have configured SSLv2 ciphersuites (these are not in the default ciphersuite list) OpenSSL 1.1.1 does not have SSLv2 support and therefore is not vulnerable to this issue. The underlying error is in the implementation of the RSA_padding_check_SSLv23() function. This also affects the RSA_SSLV23_PADDING padding mode used by various other functions. Although 1.1.1 does not support SSLv2 the RSA_padding_check_SSLv23() function still exists, as does the RSA_SSLV23_PADDING padding mode. However since there is no support for the SSLv2 protocol in 1.1.1 this is considered a bug and not a security issue in that version. This issue was reported to OpenSSL on 21st January 2021 by D. Katz and Joel Luellwitz from Trustwave. The fix was developed by Matt Caswell. Integer overflow in CipherUpdate (CVE-2021-23840) ================================================= Severity: Low Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash. This issue was reported to OpenSSL on 13th December 2020 by Paul Kehrer. The fix was developed by Matt Caswell. References ========== URL for this Security Advisory: https://www.openssl.org/news/secadv/20210216.txt Note: the online version of the advisory may be updated with additional details over time. For details of OpenSSL severity classifications please see: https://www.openssl.org/policies/secpolicy.html . Bugs fixed (https://bugzilla.redhat.com/): 2004944 - CVE-2021-23440 nodejs-set-value: type confusion allows bypass of CVE-2019-10747 2006009 - CVE-2021-3795 semver-regex: inefficient regular expression complexity 2013652 - RHACM 2.2.10 images 5. ========================================================================== Ubuntu Security Notice USN-4738-1 February 18, 2021 openssl, openssl1.0 vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.10 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: Several security issues were fixed in OpenSSL. (CVE-2021-23841) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10: libssl1.1 1.1.1f-1ubuntu4.2 Ubuntu 20.04 LTS: libssl1.1 1.1.1f-1ubuntu2.2 Ubuntu 18.04 LTS: libssl1.0.0 1.0.2n-1ubuntu5.6 libssl1.1 1.1.1-1ubuntu2.1~18.04.8 Ubuntu 16.04 LTS: libssl1.0.0 1.0.2g-1ubuntu4.19 After a standard system update you need to reboot your computer to make all the necessary changes. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202103-03 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: OpenSSL: Multiple vulnerabilities Date: March 31, 2021 Bugs: #769785, #777681 ID: 202103-03 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been found in OpenSSL, the worst of which could allow remote attackers to cause a Denial of Service condition. Background ========== OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1/v1.1/v1.2/v1.3) as well as a general purpose cryptography library. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-libs/openssl < 1.1.1k >= 1.1.1k Description =========== Multiple vulnerabilities have been discovered in OpenSSL. Please review the CVE identifiers referenced below for details. Impact ====== Please review the referenced CVE identifiers for details. Workaround ========== There is no known workaround at this time. Resolution ========== All OpenSSL users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=dev-libs/openssl-1.1.1k" References ========== [ 1 ] CVE-2021-23840 https://nvd.nist.gov/vuln/detail/CVE-2021-23840 [ 2 ] CVE-2021-23841 https://nvd.nist.gov/vuln/detail/CVE-2021-23841 [ 3 ] CVE-2021-3449 https://nvd.nist.gov/vuln/detail/CVE-2021-3449 [ 4 ] CVE-2021-3450 https://nvd.nist.gov/vuln/detail/CVE-2021-3450 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202103-03 Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. License ======= Copyright 2021 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/2.5 . Description: Red Hat Advanced Cluster Management for Kubernetes 2.1.12 images Red Hat Advanced Cluster Management for Kubernetes provides the capabilities to address common challenges that administrators and site reliability engineers face as they work across a range of public and private cloud environments. Clusters and applications are all visible and managed from a single console—with security policy built in. Container updates: * RHACM 2.1.12 images (BZ# 2007489) 3. To apply this upgrade, you must upgrade your OpenShift Container Platform version to 4.6, or later. Bugs fixed (https://bugzilla.redhat.com/): 2007489 - RHACM 2.1.12 images 2010991 - CVE-2021-32687 redis: Integer overflow issue with intsets 2011000 - CVE-2021-32675 redis: Denial of service via Redis Standard Protocol (RESP) request 2011001 - CVE-2021-32672 redis: Out of bounds read in lua debugger protocol parser 2011004 - CVE-2021-32628 redis: Integer overflow bug in the ziplist data structure 2011010 - CVE-2021-32627 redis: Integer overflow issue with Streams 2011017 - CVE-2021-32626 redis: Lua scripts can overflow the heap-based Lua stack 2011020 - CVE-2021-41099 redis: Integer overflow issue with strings 5. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Moderate: Red Hat OpenShift Container Storage 4.8.5 Security and Bug Fix Update Advisory ID: RHSA-2021:4845-01 Product: Red Hat OpenShift Container Storage Advisory URL: https://access.redhat.com/errata/RHSA-2021:4845 Issue date: 2021-11-29 CVE Names: CVE-2019-5827 CVE-2019-13750 CVE-2019-13751 CVE-2019-17594 CVE-2019-17595 CVE-2019-18218 CVE-2019-19603 CVE-2019-20838 CVE-2020-8037 CVE-2020-12762 CVE-2020-13435 CVE-2020-14155 CVE-2020-16135 CVE-2020-24370 CVE-2020-26301 CVE-2020-28493 CVE-2021-3200 CVE-2021-3426 CVE-2021-3445 CVE-2021-3572 CVE-2021-3580 CVE-2021-3778 CVE-2021-3796 CVE-2021-3800 CVE-2021-20095 CVE-2021-20231 CVE-2021-20232 CVE-2021-20266 CVE-2021-22876 CVE-2021-22898 CVE-2021-22925 CVE-2021-23840 CVE-2021-23841 CVE-2021-27645 CVE-2021-28153 CVE-2021-28957 CVE-2021-33560 CVE-2021-33574 CVE-2021-35942 CVE-2021-36084 CVE-2021-36085 CVE-2021-36086 CVE-2021-36087 CVE-2021-42574 CVE-2021-42771 ==================================================================== 1. Summary: An update is now available for Red Hat OpenShift Container Storage 4.8.5 on Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Description: Red Hat OpenShift Container Storage is software-defined storage integrated with and optimized for the Red Hat OpenShift Container Platform. Red Hat OpenShift Container Storage is highly scalable, production-grade persistent storage for stateful applications running in the Red Hat OpenShift Container Platform. In addition to persistent storage, Red Hat OpenShift Container Storage provides a multicloud data management service with an S3 compatible API. Security Fix(es): * nodejs-ssh2: Command injection by calling vulnerable method with untrusted input (CVE-2020-26301) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es): * Previously, when the namespace store target was deleted, no alert was sent to the namespace bucket because of an issue in calculating the namespace bucket health. With this update, the issue in calculating the namespace bucket health is fixed and alerts are triggered as expected. (BZ#1993873) * Previously, the Multicloud Object Gateway (MCG) components performed slowly and there was a lot of pressure on the MCG components due to non-optimized database queries. With this update the non-optimized database queries are fixed which reduces the compute resources and time taken for queries. (BZ#2015939) Red Hat recommends that all users of OpenShift Container Storage apply this update to fix these issues. 3. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 4. Bugs fixed (https://bugzilla.redhat.com/): 1993873 - [4.8.z clone] Alert NooBaaNamespaceBucketErrorState is not triggered when namespacestore's target bucket is deleted 2006958 - CVE-2020-26301 nodejs-ssh2: Command injection by calling vulnerable method with untrusted input 5. References: https://access.redhat.com/security/cve/CVE-2019-5827 https://access.redhat.com/security/cve/CVE-2019-13750 https://access.redhat.com/security/cve/CVE-2019-13751 https://access.redhat.com/security/cve/CVE-2019-17594 https://access.redhat.com/security/cve/CVE-2019-17595 https://access.redhat.com/security/cve/CVE-2019-18218 https://access.redhat.com/security/cve/CVE-2019-19603 https://access.redhat.com/security/cve/CVE-2019-20838 https://access.redhat.com/security/cve/CVE-2020-8037 https://access.redhat.com/security/cve/CVE-2020-12762 https://access.redhat.com/security/cve/CVE-2020-13435 https://access.redhat.com/security/cve/CVE-2020-14155 https://access.redhat.com/security/cve/CVE-2020-16135 https://access.redhat.com/security/cve/CVE-2020-24370 https://access.redhat.com/security/cve/CVE-2020-26301 https://access.redhat.com/security/cve/CVE-2020-28493 https://access.redhat.com/security/cve/CVE-2021-3200 https://access.redhat.com/security/cve/CVE-2021-3426 https://access.redhat.com/security/cve/CVE-2021-3445 https://access.redhat.com/security/cve/CVE-2021-3572 https://access.redhat.com/security/cve/CVE-2021-3580 https://access.redhat.com/security/cve/CVE-2021-3778 https://access.redhat.com/security/cve/CVE-2021-3796 https://access.redhat.com/security/cve/CVE-2021-3800 https://access.redhat.com/security/cve/CVE-2021-20095 https://access.redhat.com/security/cve/CVE-2021-20231 https://access.redhat.com/security/cve/CVE-2021-20232 https://access.redhat.com/security/cve/CVE-2021-20266 https://access.redhat.com/security/cve/CVE-2021-22876 https://access.redhat.com/security/cve/CVE-2021-22898 https://access.redhat.com/security/cve/CVE-2021-22925 https://access.redhat.com/security/cve/CVE-2021-23840 https://access.redhat.com/security/cve/CVE-2021-23841 https://access.redhat.com/security/cve/CVE-2021-27645 https://access.redhat.com/security/cve/CVE-2021-28153 https://access.redhat.com/security/cve/CVE-2021-28957 https://access.redhat.com/security/cve/CVE-2021-33560 https://access.redhat.com/security/cve/CVE-2021-33574 https://access.redhat.com/security/cve/CVE-2021-35942 https://access.redhat.com/security/cve/CVE-2021-36084 https://access.redhat.com/security/cve/CVE-2021-36085 https://access.redhat.com/security/cve/CVE-2021-36086 https://access.redhat.com/security/cve/CVE-2021-36087 https://access.redhat.com/security/cve/CVE-2021-42574 https://access.redhat.com/security/cve/CVE-2021-42771 https://access.redhat.com/security/updates/classification/#moderate 6. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYaTmwtzjgjWX9erEAQiaNhAAlr3+bFLFjRQ2l7VN2PTQ0i7orLBDvxOm ET3lUXgy7WOJl+AD7SgB9ILTdj1vrS1IplbhISNREDCeT9PdOZm1jExlJFVCWFuX QRXz4qpAga+42/5qgDhRcYwW4gcLRzKBmEx0R+pRYU71r/Uiz8wv12mo4kfkxICT prZitHSzkh+ER1BHXbVp6cZxWN7s6BD2D+e/tr2/Hh6IvFkIpfrR2aolasbkebQd HxP6gJDNihvlIAcdjft0xJzdqkAJ+Y/KtuFxHhJbWRG1wfMNV3mf8ebv9qDyojTU 4js1ai82zVqJwZWvZ6ryJltuQBjdPYKGt/ZgzuzzN4CULk7GWt6JGZ7BtswICt9N TiYDfKaD5gADA7f/PTwk4TgjMuxQWFi08bZiJ/ajp2KxzMqoOQhVaVUz5XoeCEaS wGgDxGP0r+2TISbZ+Fc4yPARZRPeUbuNeAPG67isliR+gMofbfuunSNNdN9IzfsT Xp2RyIIoPWf5PzM704VN/B0kv7gkij06bcZ2wBqwmDMJH8aG6ksXe7gjGfFeGoxY BXHI2oZoprsh0TlVRTffRHRc0/0PwYGAUG/lI919gXS5bUhZoK81+MlxNg7uzxtu vbhW2EhwWM/5wqbuyS0P1w/mpS+2mi+QBr/NfxM3+mAx7vFxJKKhCST0dfQtjbqn UnaUyPeShL0=/IPR -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce . Description: This release adds the new Apache HTTP Server 2.4.37 Service Pack 10 packages that are part of the JBoss Core Services offering. This release serves as a replacement for Red Hat JBoss Core Services Apache HTTP Server 2.4.37 Service Pack 9 and includes bug fixes and enhancements. Refer to the Release Notes for information on the most significant bug fixes and enhancements included in this release. Security Fix(es): * httpd: Single zero byte stack overflow in mod_auth_digest (CVE-2020-35452) * httpd: mod_session NULL pointer dereference in parser (CVE-2021-26690) * httpd: Heap overflow in mod_session (CVE-2021-26691) * httpd: mod_proxy_wstunnel tunneling of non Upgraded connection (CVE-2019-17567) * httpd: MergeSlashes regression (CVE-2021-30641) * httpd: mod_proxy NULL pointer dereference (CVE-2020-13950) * jbcs-httpd24-openssl: openssl: NULL pointer dereference in X509_issuer_and_serial_hash() (CVE-2021-23841) * openssl: Read buffer overruns processing ASN.1 strings (CVE-2021-3712) * openssl: integer overflow in CipherUpdate (CVE-2021-23840) * pcre: buffer over-read in JIT when UTF is disabled (CVE-2019-20838) * pcre: integer overflow in libpcre (CVE-2020-14155) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. Bugs fixed (https://bugzilla.redhat.com/): 1848436 - CVE-2020-14155 pcre: Integer overflow when parsing callout numeric arguments 1848444 - CVE-2019-20838 pcre: Buffer over-read in JIT when UTF is disabled and \X or \R has fixed quantifier greater than 1 1930310 - CVE-2021-23841 openssl: NULL pointer dereference in X509_issuer_and_serial_hash() 1930324 - CVE-2021-23840 openssl: integer overflow in CipherUpdate 1966724 - CVE-2020-35452 httpd: Single zero byte stack overflow in mod_auth_digest 1966729 - CVE-2021-26690 httpd: mod_session: NULL pointer dereference when parsing Cookie header 1966732 - CVE-2021-26691 httpd: mod_session: Heap overflow via a crafted SessionHeader value 1966738 - CVE-2020-13950 httpd: mod_proxy NULL pointer dereference 1966740 - CVE-2019-17567 httpd: mod_proxy_wstunnel tunneling of non Upgraded connection 1966743 - CVE-2021-30641 httpd: Unexpected URL matching with 'MergeSlashes OFF' 1995634 - CVE-2021-3712 openssl: Read buffer overruns processing ASN.1 strings 6. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

overflow

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Red Hat

SOURCES

LAST UPDATE DATE

2025-09-14T20:45:42.381000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE